alidade
[ al-i-deyd ]
/ ˈæl ɪˌdeɪd /
noun Surveying.
(in plane-tabling) a straightedge having a telescopic sight or other means of sighting parallel to the straightedge.
the entire upper part of a theodolite or transit, including the telescope, its supports, the level vials, the circle-reading device, and the spindle.
Also
al·i·dad
[al-i-dad] /ˈæl ɪˌdæd/.
Origin of alidade
1400–50; variant of
alhidade < Medieval Latin
alhidada < Arabic
al-ʿiḍādah the turning radius (like a clock hand) of a circle; replacing late Middle English
allydatha (< Old Spanish
alhidada)
Words nearby alidade
alice's fern,
alice-in-wonderland,
alicia,
alick,
alicyclic,
alidade,
alien,
alien and sedition acts,
alienable,
alienage,
alienate
Example sentences from the Web for alidade
Your scale is ready to be pasted or transferred to the alidade and each 6.8.
Military Instructors Manual |James P. Cole and Oliver SchoonmakerThe alidade is a triangular ruler with one or more working scales on it beside other measurements.
Military Instructors Manual |James P. Cole and Oliver SchoonmakerClose by stood an alidade, an instrument for measuring angles.
Historical Miniatures |August StrindbergAfter he had placed the plane table on a tripod and upon this the alidade, he started to work.
On the Seaboard |August Strindberg
British Dictionary definitions for alidade
alidade
alidad (ˈælɪˌdæd)
/ (ˈælɪˌdeɪd) /
noun
a surveying instrument used in plane-tabling for drawing lines of sight on a distant object and taking angular measurements
the upper rotatable part of a theodolite, including the telescope and its attachments
Word Origin for alidade
C15: from French, from Medieval Latin
allidada, from Arabic
al-'idāda the revolving radius of a circle